Mark Hamill, the actor who played Luke Skywalker, brought his family to the set of Return of the Jedi in 1983. His wife and his son had a lot of fun with the props and costumes. Hamill recently displayed the photos at the Star Wars Celebration convention in Anaheim.
Young Nathan Hamill found that R2-D2 offered a great hiding spot and that Yoda’s hut was just the right size for him. You can see more photos here.